NSH now supports a shutdown command if CONFIG_BOARDCTL_POWEROFF-y

ChangeLog.txt

@@ -1327,3 +1327,6 @@
 	* The apps/ directory has been removed from the NuttX GIT repository
 	  and now stands alone in its own repository (2015-06-27).
 	* apps/examples/poll: Fix a few bit-rot compilation errors (2015-07-01).
+	* apps/nshlib: NSH will now support an (optional) shutdown command if
+	  the board provides the option CONFIG_BOARD_POWEROFF (2015-07-04).
+

nshlib/Kconfig

@@ -332,6 +332,11 @@ config NSH_DISABLE_SH
 	bool "Disable sh"
 	default n
 
+config CONFIG_NSH_DISABLE_SHUTDOWN
+	bool "Disable sh"
+	default n
+	depends on BOARDCTL_POWEROFF
+
 config NSH_DISABLE_SLEEP
 	bool "Disable sleep"
 	default n

nshlib/Makefile

@@ -42,7 +42,7 @@ include $(APPDIR)/Make.defs
 ASRCS  =
 CSRCS  = nsh_init.c nsh_parse.c nsh_console.c nsh_script.c
 CSRCS += nsh_command.c nsh_fscmds.c nsh_ddcmd.c nsh_proccmds.c nsh_mmcmds.c
-CSRCS += nsh_timcmds.c nsh_envcmds.c nsh_dbgcmds.c
+CSRCS += nsh_timcmds.c nsh_envcmds.c nsh_syscmds.c nsh_dbgcmds.c
 
 ifeq ($(CONFIG_NFILE_STREAMS),0)
 CSRCS += nsh_stdsession.c

nshlib/README.txt

@@ -884,6 +884,11 @@ o sh <script-path>
   Execute the sequence of NSH commands in the file referred
   to by <script-path>.
 
+o shutdown
+
+  Shutdown and power off the system immediately.  This command depends on
+  hardware support to power down the system.
+
 o sleep <sec>
 
   Pause execution (sleep) of <sec> seconds.
@@ -990,6 +995,7 @@ Command Dependencies on Configuration Settings
   rmdir      (((!CONFIG_DISABLE_MOUNTPOINT && CONFIG_FS_WRITABLE) || !CONFIG_DISABLE_PSEUDOFS_OPERATIONS) && CONFIG_NFILE_DESCRIPTORS > 0)
   set        !CONFIG_DISABLE_ENVIRON
   sh         CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_NFILE_STREAMS > 0 && !CONFIG_NSH_DISABLESCRIPT
+  shutdown   CONFIG_BOARDCTL_POWEROFF
   sleep      !CONFIG_DISABLE_SIGNALS
   test       !CONFIG_NSH_DISABLESCRIPT
   umount     !CONFIG_DISABLE_MOUNTPOINT && CONFIG_NFILE_DESCRIPTORS > 0 && CONFIG_FS_READABLE
@@ -1028,10 +1034,10 @@ also allow it to squeeze into very small memory footprints.
   CONFIG_NSH_DISABLE_MV,        CONFIG_NSH_DISABLE_NFSMOUNT,  CONFIG_NSH_DISABLE_PS,
   CONFIG_NSH_DISABLE_PING,      CONFIG_NSH_DISABLE_PING6,     CONFIG_NSH_DISABLE_PUT,
   CONFIG_NSH_DISABLE_PWD,       CONFIG_NSH_DISABLE_RM,        CONFIG_NSH_DISABLE_RMDIR,
-  CONFIG_NSH_DISABLE_SET,       CONFIG_NSH_DISABLE_SH,        CONFIG_NSH_DISABLE_SLEEP,
+  CONFIG_NSH_DISABLE_SET,       CONFIG_NSH_DISABLE_SH,        CONFIG_NSH_DISABLE_SHUTDOWN,  
-  CONFIG_NSH_DISABLE_TEST,      CONFIG_NSH_DISABLE_UMOUNT,    CONFIG_NSH_DISABLE_UNSET,
+  CONFIG_NSH_DISABLE_SLEEP,     CONFIG_NSH_DISABLE_TEST,      CONFIG_NSH_DISABLE_UMOUNT,
-  CONFIG_NSH_DISABLE_URLDECODE, CONFIG_NSH_DISABLE_URLENCODE, CONFIG_NSH_DISABLE_USLEEP,
+  CONFIG_NSH_DISABLE_UNSET,     CONFIG_NSH_DISABLE_URLDECODE, CONFIG_NSH_DISABLE_URLENCODE,
-  CONFIG_NSH_DISABLE_WGET,      CONFIG_NSH_DISABLE_XD
+  CONFIG_NSH_DISABLE_USLEEP,    CONFIG_NSH_DISABLE_WGET,      CONFIG_NSH_DISABLE_XD
 
 Verbose help output can be suppressed by defining CONFIG_NSH_HELP_TERSE.  In that
 case, the help command is still available but will be slightly smaller.

nshlib/nsh.h

@@ -988,6 +988,10 @@ void nsh_usbtrace(void);
 #  endif
 #endif /* CONFIG_NET */
 
+#if defined(CONFIG_BOARDCTL_POWEROFF) && !defined(CONFIG_NSH_DISABLE_SHUTDOWN)
+   int cmd_shutdown(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#endif
+
 #ifndef CONFIG_DISABLE_ENVIRON
 #  ifndef CONFIG_NSH_DISABLE_SET
       int cmd_set(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);

nshlib/nsh_command.c

@@ -369,6 +369,10 @@ static const struct cmdmap_s g_cmdmap[] =
 # endif
 #endif
 
+#if defined(CONFIG_BOARDCTL_POWEROFF) && !defined(CONFIG_NSH_DISABLE_SHUTDOWN)
+  { "shutdown", cmd_shutdown, 1, 1, NULL },
+#endif
+
 #ifndef CONFIG_DISABLE_SIGNALS
 # ifndef CONFIG_NSH_DISABLE_SLEEP
   { "sleep",    cmd_sleep,    2, 2, "<sec>" },